CN109236944B

CN109236944B - Suspension type track corrugation prevention and control device for subway vehicle axle box

Info

Publication number: CN109236944B
Application number: CN201811119554.8A
Authority: CN
Inventors: 周劲松; 崔日新; 宫岛; 孙文静; 孙煜
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2020-06-02
Anticipated expiration: 2038-09-25
Also published as: CN109236944A

Abstract

The invention relates to a subway vehicle axle box suspension type track corrugation control device which is a dynamic vibration absorption device and is used for being suspended below an axle box (1) of a subway vehicle to absorb vibration energy of wheels under the characteristic frequency of corrugation, the device comprises a damping body (2) and a counterweight mass block (3), wherein the damping body (2) consists of an inner side metal layer (21), a rubber damping layer (22) and an outer side metal layer (23) which are sequentially connected, the inner side metal layer (21) is fixedly connected with the axle box (1), and the outer side metal layer (23) is connected with the counterweight mass block (3) through a mortise and tenon structure (4). Compared with the prior art, the vibration absorption device is suspended at the lower part of the axle box, so that the rail corrugation problem caused by the resonance of the natural frequency of the wheel set and the natural frequency of the rail can be effectively solved, the vibration and noise of the vehicle passing through the existing rail corrugation section are reduced, and the running comfort of the vehicle is improved.

Description

Suspension type track corrugation prevention and control device for subway vehicle axle box

Technical Field

The invention relates to a dynamic vibration absorption device for a subway vehicle, in particular to a suspension type dynamic vibration absorption device for a shaft box of the subway vehicle, which can effectively reduce and prevent the rail corrugation problem caused by the resonance of natural frequency of a wheel set and some natural frequency of a rail or reduce the vibration noise problem of the rail corrugation caused by the natural frequency of the wheel set and some natural frequency of the rail.

Background

In recent years, to meet the requirement of environmental protection, methods for reducing the elasticity of the underfloor foundation are frequently adopted in subways to reduce the propagation of vibration to the surrounding environment. But the wheel rail resonance caused by reducing the rigidity of the base under the rail brings about a more serious rail damage problem, namely rail corrugation. When the subway vehicle passes through the rail corrugation section, huge vibration and noise can be generated on the vehicle body, and riding comfort of passengers is seriously influenced. At present, the corrugation with a relatively low degree can be removed by grinding, only the steel rail can be replaced seriously, and the maintenance cost is very expensive. In a short period after grinding or rail replacement, rail corrugation occurs again, and the problem of rail corrugation cannot be solved radically.

The origin of rail corrugation is quite complex, one of the more important reasons is the resonance of the wheel and rail, i.e. the natural frequency of the wheel set is consistent with some natural frequencies of the rail, and the resonance causes the rail corrugation. For the corrugation problem caused by the resonance of the wheel and the rail, the natural vibration frequency of the track or the wheel pair can be changed. Some researches adopt methods of increasing the rigidity of the rubber pad under the rail, adding a steel rail dynamic vibration absorber and the like, and have good effect of improving the wave grinding problem, but because the distance of the track is long, the transformation of the track structure consumes a large amount of manpower and material resources. Based on the background, the invention provides the vibration absorption device suspended on the axle box of the metro vehicle, which can effectively improve the resonance problem of the wheel track and is more economical and practical by changing the natural vibration frequency of the wheel set structure. The invention can effectively absorb the energy of wheel vibration under the corrugation characteristic frequency, thereby effectively preventing and treating the rail corrugation problem caused by wheel rail resonance and ensuring the comfort of the subway vehicle.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a subway vehicle axle box suspension type track corrugation control device.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a railcar axle box suspension type track ripples grinds prevention and control device, it is the dynamic vibration absorbing device for hang in midair in railcar axle box below to absorb the vibration energy of wheel under the ripples grinds characteristic frequency, including damping body and counter weight quality piece, the damping body constitute by the inboard metal level, rubber damping layer and the outside metal level that connect gradually, inboard metal level and axle box fixed connection, the outside metal level is connected with the counter weight quality piece through mortise-tenon joint structure.

Preferably, the inside metal layer consists of an inside metal layer body and extending parts which are positioned at two ends of the inside metal layer body and are integrally formed with the inside metal layer, the rubber damping layer is connected to the inside metal layer body, threaded holes are formed in the extending parts, and the device is suspended below the axle box of the subway vehicle through bolts penetrating through the threaded holes. The suspension mounting mode can fully utilize the space under the axle box of the vehicle, and the suspension mounting mode can not occupy the working space of the existing structural component of the vehicle bogie, and is very convenient to assemble and disassemble.

Preferably, the device is suspended from four axleboxes of each rotating frame of the metro vehicle.

Preferably, the rubber damping layer is integrally bonded with the inner metal layer and the outer metal layer through vulcanization.

Preferably, the outer side metal layer is provided with a trapezoidal tenon on the connection surface with the counterweight mass block, the counterweight mass block is provided with a dovetail groove matched with the trapezoidal tenon on the connection surface with the outer side metal layer, and the trapezoidal tenon and the dovetail groove are connected in an inserting manner to form a mortise and tenon structure. The mortise and tenon connection installation between the outer side metal layer and the counterweight mass block is very safe and convenient, and the counterweight blocks with different masses can be conveniently replaced according to the requirements of different line rail corrugation treatment.

Preferably, the inner metal layer and the outer metal layer of the damping body are made of steel.

Preferably, the counterweight mass block is made of steel.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the dynamic vibration absorption device is added on the axle box of the metro vehicle, so that the energy of the vibration of the wheel under the characteristic frequency of the corrugation can be absorbed, the resonance of the wheel and the rail is avoided, the problem of the corrugation of the steel rail caused by the resonance can be prevented and treated, the comfort of the metro vehicle is ensured, and the metro vehicle is very convenient to install, replace and disassemble and is economical in manufacturing cost.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure, 1 is an axle box, 2 is a damping body, 21 is an inner side metal layer, 211 is a threaded hole, 22 is a rubber damping layer, 23 is an outer side metal layer, 3 is a counterweight mass block, and 4 is a mortise and tenon structure.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

Example 1

A subway vehicle axle box suspension type track corrugation control device is shown in figure 1 and is a dynamic vibration absorption device and used for being suspended below a subway vehicle axle box 1 to absorb vibration energy of wheels under corrugation characteristic frequency, and the device comprises a damping body 2 and a counterweight mass block 3, wherein the damping body 2 is composed of an inner side metal layer 21, a rubber damping layer 22 and an outer side metal layer 23 which are sequentially connected, the inner side metal layer 21 is fixedly connected with the axle box 1, and the outer side metal layer 23 is connected with the counterweight mass block 3 through a mortise and tenon joint structure 4.

Specifically, in the present embodiment, the rubber damper layer 22 is integrally bonded to the inner metal layer 21 and the outer metal layer 23 by vulcanization. The inner metal layer 21 is composed of an inner metal layer body and extending portions located at two ends of the inner metal layer body and integrally formed with the inner metal layer, the rubber damping layer 22 is connected to the inner metal layer body, threaded holes 211 are formed in the extending portions, and the device is suspended below the subway vehicle axle box 1 through bolts penetrating through the threaded holes 211. In actual use, the device is suspended on four axle boxes 1 of each rotating frame of the metro vehicle.

In this embodiment, the outer metal layer 23 is provided with a trapezoidal tenon on the connecting surface with the counterweight mass block 3, the counterweight mass block 3 is provided with a dovetail groove matched with the trapezoidal tenon on the connecting surface with the outer metal layer 23, and the trapezoidal tenon and the dovetail groove are connected in an inserting manner to form the mortise and tenon structure 4.

In this embodiment, the inner metal layer 21 and the outer metal layer 23 of the damper body are made of steel. The rubber damping layer 22 is made of damping material with proper rigidity and damping performance. The counterweight mass block 3 is made of steel. The quality of which depends on the design requirements.

The vibration absorption device is suspended at the lower part of the axle box to absorb the vibration energy of the wheel set under the resonance frequency of the wheel set and the rail, so that the resonance of the wheel set and the rail is avoided, the problem of rail corrugation caused by the resonance of the natural frequency of the wheel set and some natural frequencies of the rail can be effectively solved, the vibration and noise of the vehicle passing through the existing rail corrugation section are reduced, and the running comfort of the vehicle is improved.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. The utility model provides a railcar axle box suspension type track ripples grinds prevention and control device which characterized in that, it is the dynamic vibration absorbing device for hang in midair in railcar axle box (1) below to absorb the vibration energy of wheel under the ripples grinds characteristic frequency, including damping body (2) and counter weight quality piece (3), damping body (2) constitute by inboard metal level (21), rubber damping layer (22) and outside metal level (23) that connect gradually, inboard metal level (21) and axle box (1) fixed connection, outside metal level (23) are connected with counter weight quality piece (3) through mortise-tenon structure (4).

2. The apparatus according to claim 1, wherein the inner metal layer (21) is composed of an inner metal layer body and extensions formed at both ends of the inner metal layer body and integrally formed with the inner metal layer, the rubber damping layer (22) is connected to the inner metal layer body, the extensions have threaded holes (211), and the apparatus is suspended under the axle box (1) of the subway vehicle by bolts inserted into the threaded holes (211).

3. A metro vehicle axle box suspension type track corrugation control apparatus according to claim 2, wherein the apparatus is suspended from four axle boxes (1) of each rotating frame of the metro vehicle.

4. A railcar axle-box suspension type track corrugation control apparatus according to claim 1, characterized in that said rubber damping layer (22) is integrally bonded to said inner metal layer (21) and said outer metal layer (23) by vulcanization.

5. The subway vehicle axle box suspension type track corrugation control device according to claim 1, wherein a trapezoidal tenon is arranged on a connecting surface of the outer side metal layer (23) and the counterweight mass block (3), a dovetail groove matched with the trapezoidal tenon is arranged on a connecting surface of the counterweight mass block (3) and the outer side metal layer (23), and the trapezoidal tenon and the dovetail groove are connected in an inserting mode to form the mortise and tenon structure (4).

6. The apparatus according to claim 1, wherein the inner metal layer (21) and the outer metal layer (23) of the damping body are made of steel.

7. A railcar axle-box suspended track corrugation control device according to claim 1, characterized in that the counterweight mass (3) is made of steel.